Effective Treatment of Persistent Organic Pollutants in Stormwater Runoff
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Growing evidence suggests that persistent organic pollutants, like PCBs and PAHs, can be found in stormwater runoff from all types of land uses across Washington.

Because these pollutants persist in rivers, lakes, and marine waterbodies, they can create long-term impacts, affecting human health and aquatic species. These types of pollutants can persist up the food chain, leading to high levels in top predators such as the Southern Resident Killer Whale population. This session will highlight three recent studies that have investigated the effectiveness of bioretention Best Management Practices to remove persistent organic pollutants from stormwater runoff. Results from these studies suggest that bioretention BMPs can effectively remove persistent organic pollutants from stormwater runoff. Presentations will highlight bioretention design parameters that can improve removal of persistent organic pollutants from runoff, including bioretention soil media selection and design treatment flow rates.

Publication Summary

  • Geosyntec Authors: Myles Gray
  • All Authors: Myles Gray, Geosyntec Consultants; Richard Jack, King County; Chelsea Mitchell, Washington State University
  • Title: Managing Stormwater
  • Event or Publication: Event
  • Practice Areas: Urban Stormwater Management Planning and Design
  • Citation: Robert Anderson, LHG, CWRE (Washington), Christian Nilsen, P.E. (Washington), and Myles Gray (Oregon) will be presenting at the Managing Stormwater in Washington at the Greater Tacoma Convention Center in Tacoma, Washington on March 11, 2020.
  • Date: March 11, 2020
  • Location: Tacoma, Washington
  • Publication Type: Platform Presentation